Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/82817
Título: | Dielectric spectroscopy of melt-mixed polypropylene and pyrolytically stripped carbon nanofiber composites |
Autor(es): | Samir, Zineb Paleo, Antonio J. Aribou, Najoia Nioua, Yassine Silva, Jaime Oliveira da Cerqueira, M. F. Moreira, Joaquim Agostinho Achour, Mohammed E. |
Palavras-chave: | Carbon nanofibers Polypropylene Electrical conductivity Dielectric permittivity Electrical modulus Electrical impedance |
Data: | 2022 |
Editora: | Multidisciplinary Digital Publishing Institute (MDPI) |
Revista: | Journal of Composites Science |
Citação: | Samir, Z.; Paleo, A.J.; Aribou, N.; Nioua, Y.; da Silva, J.O.; Cerqueira, M.F.; Moreira, J.A.; Achour, M.E. Dielectric Spectroscopy of Melt-Mixed Polypropylene and Pyrolytically Stripped Carbon Nanofiber Composites. J. Compos. Sci. 2022, 6, 368. https://doi.org/10.3390/jcs6120368 |
Resumo(s): | In this work, pyrolytically stripped carbon nanofiber (CNF) polypropylene (PP) composites were synthesized following a scalable melt-mixing method, and the effects of CNF weight concentrations on the electrical conductivity, dielectric permittivity, electrical modulus and electrical impedance of PP/CNF composites were studied. Quite unexpectedly, the electrical conductivity of PP/CNF composites improved only slightly as the incorporation of CNFs was raised, yielding a maximum of ~10−10 S m−1 for PP/CNF 5 wt. % composites. The increase corresponded to a gradual improvement of the dielectric constant up to a maximum of ~9 for PP/CNF 5 wt. % composites at 1 MHz, which was attributed to the raise of interface polarization effect. Moreover, the Cole–Cole model was used to analyze the effects of CNF concentrations on the dielectric relaxation of PP/CNF composites, from which was deduced that the incorporation of CNFs increases their dielectric strength and relaxation times. The analysis gathered here aims to provide a better insight into the enhanced dielectric properties observed in low-conducting polymer composites filled with CNFs. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/82817 |
DOI: | 10.3390/jcs6120368 |
ISSN: | 2504-477X |
e-ISSN: | 2504-477X |
Versão da editora: | https://www.mdpi.com/2504-477X/6/12/368 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | PHYSICS OF QUANTUM MATERIALS AND BIONANOSTRUCTURES (2018 - ...) DET/2C2T - Artigos em revistas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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jcs-06-00368.pdf | 3,37 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons